~adapted by Walch Education The Pythagorean Theorem is often used to find the lengths of the sides...

9
Proving the Pythagorean Theorem Using Similarity ~adapted by Walch Education

Transcript of ~adapted by Walch Education The Pythagorean Theorem is often used to find the lengths of the sides...

  • Slide 1
  • Slide 2
  • ~adapted by Walch Education
  • Slide 3
  • The Pythagorean Theorem is often used to find the lengths of the sides of a right triangle, a triangle that includes one 90 angle. By the way, Geometry includes many statements. Once a statement has been shown to be true, it is called a theorem.
  • Slide 4
  • The sum of the squares of the lengths of the legs (a and b) of a right triangle is equal to the square of the length of the hypotenuse (c). a 2 + b 2 = c 2
  • Slide 5
  • If the sum of the squares of the measures of two sides of a triangle equals the square of the measure of the longest side, then the triangle is a right triangle.
  • Slide 6
  • Paragraph proofs are statements written out in complete sentences in a logical order to show an argument. Two-column proofs include numbered statements and corresponding reasons that show the argument in a logical order. Flow proofs are a graphical method of presenting the logical steps used to show an argument. In a flow proof, the logical statements are written in boxes and the reason for each statement is written below the box.
  • Slide 7
  • We will write a two column proof in class for this and maybe a paragraph proof, Ok, why not?! A flow proof as well.
  • Slide 8
  • Find the length of the altitude, x, of
  • Slide 9
  • Use corresponding sides to write a proportion containing x (x)(x) = (10)(18) x 2 = 180 therefore
  • Slide 10
  • ~Ms. Dambreville